How Long Does a Mortgage Pre-Approval Letter Stay Valid?
A pre-approval letter can feel like a fixed credential once it’s in hand, but lenders generally treat it as a temporary snapshot rather than something that holds indefinitely.
The short answer
Mortgage pre-approval letters commonly stay valid for somewhere around 60 to 90 days, though the exact window is set by each individual lender and can vary. Once that period passes, the lender typically needs to refresh the underlying financial information — credit, income, and assets — before the pre-approval can be relied on again. The expiration exists because the information behind the letter is only accurate as of the day it was pulled.
Why lenders put an expiration on it
A pre-approval is based on a review of credit reports, income documentation, and account balances at a particular moment, and all three of those can shift. Credit scores fluctuate with new activity, income can change with a new job or a change in hours, and account balances move with everyday spending and saving. Rather than treating an old snapshot as permanently reliable, lenders build in an expiration so that any offer made using the pre-approval is backed by reasonably current information, similar in spirit to how rate shopping windows exist to keep multiple credit pulls from stacking up unnecessary inquiries.
What triggers a refresh before that window closes
Even within the stated validity period, certain events can prompt a lender to want updated documentation sooner — a new credit account, a large deposit or withdrawal, a change in employment, or simply enough time passing that pay stubs or bank statements no longer fall within what the lender considers current. This is one reason it helps to understand what documents are typically needed for a pre-approval in the first place, since the same categories of paperwork often need to be refreshed rather than replaced with something entirely new.
What happens if it expires before an offer is accepted
If a pre-approval letter expires before a home is found or an offer is made, the borrower generally needs to go through the process again, providing updated documentation so the lender can reissue the letter. This isn’t usually a lengthy process if nothing major has changed financially, but it does mean the pre-approval isn’t something to treat as a one-time task at the very start of a home search that never needs revisiting. For buyers who shop over an extended period, refreshing the letter partway through is often just part of the process, similar to how a rate lock has its own separate expiration once a specific loan is in progress.
What to weigh during a longer search
Anyone searching for a home over several months should expect to refresh their pre-approval at least once, and should budget time for that step rather than being caught off guard by an expired letter mid-negotiation. Keeping recent financial documents on hand, and avoiding major financial changes during an active search, tends to make each refresh faster and less disruptive to an ongoing offer process.
The bottom line
A pre-approval letter’s validity window reflects how quickly financial information can go stale, not an arbitrary bureaucratic rule, and the exact length varies by lender. Treating it as a renewable snapshot rather than a permanent credential makes it easier to plan a home search that stretches longer than expected.